摘要
An MWDC array(see Fig.1)was constructed in the External Target Facility(ETF),HIRFL-CSR for particle tracking,which plays a vital role in particle identification(PID)for experiments conducted in ETF.The MWDC array is composed of three identical MWDCs,with an effective area 800 mm600 mm,drift length 5 mm,operating gas 80%Ar+20%CO2.A 311 AMeV 40Ar beam test was implemented on the MWDC array for its tracking performance.
